Diagnostic Trouble Code Chart

WARNING: This page is about a different car, the 2010 Lexus GS 460 and 2010 Lexus GS 350. However, it is still accessible from the selected car via links, so may be relevant.

NAVIGATION SYSTEM

DTC Code	Detection Item	Trouble Area	See
B156A	Gateway ECU Disconnected	1. Network gateway ECU power source circuit 2. AVC-LAN circuit between display and navigation module display and network gateway ECU 3. Network gateway ECU 4. Display and navigation module display	Refer to DTC B1590: No Response from Gateway ECU; DTC B156A: Gateway ECU Disconnected
B156B	Multi-media Interface ECU Disconnected	1. Multi-media interface ECU power source circuit 2. AVC-LAN circuit between display and navigation module display and multi-media interface ECU 3. Multi-media interface ECU 4. Display and navigation module display	Refer to DTC B156E: No Response from Multi-media Interface ECU; DTC B156B: Multi-media Interface ECU Disconnected
B156E	No Response from Multi-media Interface ECU	1. Multi-media interface ECU power source circuit 2. AVC-LAN circuit between display and navigation module display and multi-media interface ECU 3. Multi-media interface ECU 4. Display and navigation module display	Refer to DTC B156E: No Response from Multi-media Interface ECU; DTC B156B: Multi-media Interface ECU Disconnected
B1590	No Response from Gateway ECU	1. Network gateway ECU power source circuit 2. AVC-LAN circuit between display and navigation module display and network gateway ECU 3. Network gateway ECU 4. Display and navigation module display	Refer to DTC B1590: No Response from Gateway ECU; DTC B156A: Gateway ECU Disconnected
B1591	No Response from Audio HU	1. Radio receiver assembly power source circuit 2. MOST circuit between stereo component amplifier assembly and radio receiver assembly 3. MOST circuit between radio receiver assembly and display and navigation module display 4. Radio receiver assembly 5. Display and navigation module display	Refer to DTC B1591: No Response from Audio HU; DTC B15D1: Audio HU Disconnected
B1593	No Response from Stereo Component Amplifier	1. Stereo component amplifier assembly power source circuit 2. MOST circuit between display and navigation module display and stereo component amplifier assembly 3. MOST circuit between stereo component amplifier assembly and radio receiver assembly 4. Stereo component amplifier assembly 5. Display and navigation module display	Refer to DTC B1593: No Response from Stereo Component Amplifier; DTC B15D3: Stereo Component Amplifier Disconnected
B15A0	LAN Master Malfunction	Display and navigation module display	Refer to DTC B15A0: LAN Master Malfunction; DTC B15AD: Navigation Processor Malfunction
B15AD	Navigation Processor Malfunction	Display and navigation module display	Refer to DTC B15A0: LAN Master Malfunction; DTC B15AD: Navigation Processor Malfunction
B15B0	Display Screen Malfunction	Display and navigation module display	Refer to DTC B15B0: Display Screen Malfunction
B15B8	Harddisk Malfunction	Hard disk drive	Refer to DTC B15B8: Harddisk Malfunction
B15C0	Short in GPS Antenna	1. Wire harness 2. Navigation antenna assembly 3. Display and navigation module display	Refer to DTC B15C0: Short in GPS Antenna; DTC B15C1: Open in GPS Antenna
B15C1	Open in GPS Antenna	1. Wire harness 2. Navigation antenna assembly 3. Display and navigation module display	Refer to DTC B15C0: Short in GPS Antenna; DTC B15C1: Open in GPS Antenna
B15C2	Speed Signal Malfunction	1. Wire harness or connector 2. Combination meter assembly 3. Display and navigation module display	Refer to DTC B15C2: Speed Signal Malfunction
B15D0	MOST Communication Malfunction	1. Speaker circuit (w/ rear header speaker) 2. MOST line check 3. MOST communication line connector 4. MOST communication line 5. Stereo component amplifier assembly 6. Radio receiver assembly 7. Display and navigation module display	Refer to DTC B15D0: MOST Communication Malfunction
B15D1	Audio HU Disconnected	1. Radio receiver assembly power source circuit 2. MOST circuit between stereo component amplifier assembly and radio receiver assembly 3. MOST circuit between radio receiver assembly and display and navigation module display 4. Radio receiver assembly 5. Display and navigation module display	Refer to DTC B1591: No Response from Audio HU; DTC B15D1: Audio HU Disconnected
B15D3	Stereo Component Amplifier Disconnected	1. Stereo component amplifier assembly power source circuit 2. MOST circuit between display and navigation module display and stereo component amplifier assembly 3. MOST circuit between stereo component amplifier assembly and radio receiver assembly 4. Stereo component amplifier assembly 5. Display and navigation module display	Refer to DTC B1593: No Response from Stereo Component Amplifier; DTC B15D3: Stereo Component Amplifier Disconnected
B15E7	Harddisk Reading/Writing Malfunction(Low Temperature)	Hard disk drive	Refer to DTC B15E7: Harddisk Reading/Writing Malfunction(Low Temperature); DTC B15E8: Harddisk Reading/Writing Malfunction(High Temperature)
B15E8	Harddisk Reading/Writing Malfunction(High Temperature)	Hard disk drive	Refer to DTC B15E7: Harddisk Reading/Writing Malfunction(Low Temperature); DTC B15E8: Harddisk Reading/Writing Malfunction(High Temperature)
U0073	Control Module Communication Bus Off	CAN communication system	Refer to DTC U0073: Control Module Communication Bus Off; DTC U0100: Lost Communication with ECM; DTC U1110: Lost Communication with Clearance Warning ECU
U0100	Lost Communication with ECM	CAN communication system	Refer to DTC U0073: Control Module Communication Bus Off; DTC U0100: Lost Communication with ECM; DTC U1110: Lost Communication with Clearance Warning ECU
U1110	Lost Communication with Clearance Warning ECU	CAN communication system	Refer to DTC U0073: Control Module Communication Bus Off; DTC U0100: Lost Communication with ECM; DTC U1110: Lost Communication with Clearance Warning ECU